Table 1.

Productivity (CFU/mL) of each ecotype grown for 24 h in the mixed community relative to its yield in monoculture

Ecotype	Early1	Late1	t Statistic	P value	df	Interpretation
S	0.75	1.65	−5.437	0.006	4	A benefit evolves for growth in mixture.
R	0.03	0.13	−3.555	0.024	4	Performs better alone, but growth in mixture improves.
W	0.02	0.04	−2.288	0.084	4	Performs better alone. Growth does not improve in mixture.

Pairwise differences between phenotypically similar ecotypes from Early and Late populations were determined by Tukey's HSD post hoc tests (P < 0.05, n = 5) after one-way ANOVA using log₁₀ transformed data.

¹Ratio, CFU/mL in mixed culture: CFU/mL in solitary culture.